Dear colleagues, I'm trying to figure out how to break down shape differences onto individual PC axes. I have a morphospace where PC1 explains 60% of shape variation and PC2 explains 20% of variation. Two subsets of samples of particular interest do not differ much along PC1, but differs significantly along PC2. How should I project the shape difference between these subsets onto seperate PC axes, such that I can quantitatively show X% of shape difference between them are along PC1 and Y% is along PC2?
A simple vector projection (i.e. using the mean difference of PC1 score and PC2 score) doesn't feel right to me as I don't think PC scores are directly comparable between different PCs. Any suggestions would be greatly appreciated. Many thanks for your time. -- Yinan Hu Postdoctoral fellow Biology Department Boston College 140 Commonwealth Ave, 360 Higgins Hall Chestnut Hill, MA 02467 -- MORPHMET may be accessed via its webpage at http://www.morphometrics.org --- You received this message because you are subscribed to the Google Groups "MORPHMET" group. To unsubscribe from this group and stop receiving emails from it, send an email to morphmet+unsubscr...@morphometrics.org.
